Internal Combustion Engines

Course Objectives:
At the end of the course, the student will be able to understand:

  1. Construction and operation of IC engine,
  2. Fuels and combustion of fuels in SI and CI engine,
  3. Conduct performance test and carry out calculations,
  4. Formation of exhaust emissions and their controlling measures.

Course Outlines:

  1. Overview of thermodynamics of fuel-air cycles and real cycles(5 hours)
    1. Otto cycle, Diesel cycle, Atkinson cycle, Stirling cycle, Brayton cycle.
    2. Assumptions in  fuel air cycle analysis
    3. Composition of cylinder gases

  2. Engine construction and operation(4 hours)
    1. Construction and working principle of SI, CI engines and gas turbines
    2. Major engine components
    3. Four stroke and two stroke engines

  3. Engine fuels (6 hours)
    1. Basic requirements of engine fuels:
    2. Chemical structure of petroleum
    3. Heat value of fuels.
    4. Rating of SI Engine fuels,
    5. Rating of CI engine fuels
    6. Combustion equation for hydrocarbon fuels
    7. Properties and ratings of petrol and diesel fuels
    8. Fuel supply systems of SI and CI engines
    9. Non-conventional fuels for IC engines; LPG, CNG, Methanol, Ethanol, Non-edible vegetable oils, Hydrogen.

  4. Carburetor & Fuel Injection systems(6 hours)
    1. Construction and working of carburettor
    2. Inlet and exhaust valve timings
    3. Fuel feed and fuel injection pumps
    4. Petrol injection
    5. Electronic Fuel Injection systems (EFI)
    6. Multi-point fuel injection system (MPFI)

  5. Combustion in SI and CI Engines(6 hours)
    1. Ignition systems
    2. Stages of combustion in engines
    3. Flame propagation and factors affecting it
    4. Knocking  a nd pre-ignition
    5. Factors affecting knocking and Control of knocking
    6. Combustion chamber requirements
    7. Turbo charging and super charging
    8. Engine emissions
    9. Engine emissions and emission standards

  6. Engine lubrication systems(4 hours)
    1. Engine lubrication systems
    2. Hydrodynamic theory of lubrication
    3. Properties of lubricants
    4. Types of lubricants and additives
    5. Grading of lubricating oils

  7. Engine cooling(6 hours)
    1. Air and water cooling systems
    2. Working principles of air and water cooling systems
    3. Variation of gas temperatures
    4. Components of water cooling system

  8. Engine performance  and testing of engines(8 hours)
    1. Performance parameters
    2. Engine power, BHP, Fuel consumption, Air consumption
    3. Engine heat balance sheet
    4. Mechanical efficiency
    5. Engine efficiencies
    6. Testing of engines and related numerical problems

Practicals:

  1. Engine dismantling and engine assembly: SI and CI engines.
  2. Identification of engine components and checking them for defects.
  3. Performance testing of SI/CI engine
  4. Tailpipe emission testing of given engine

References:

  1. Heywood, J. B, , Internal Combustion Engine Fundamentals, McGraw Hill Publishing Co., New York, 1990.
  2. Sharma, S. P, Chandramohan, Fuels and Combustion, Tata McGraw Hill Publishing Co, 1987.
  3. Mathur and Sharma, A course on Internal combustion Engines, Dhanpat Rai & Sons, 1998.
  4. Pulkrabek, W. W., Engineering Fundamentals of the Internal Combustion Engine, Prentice-Hall of India Private Limited, 2002.
  5. Prof. P.L. Ballaney, Internal Combustion Engines, Khanna Publications, Delhi, India
  6. R.K. Mohanty, A  Text Book of Internal Combustion Engines, Standard Book House, Delhi, India

Evaluation Scheme:
There will be questions covering all the chapters of the syllabus. The evaluation scheme for the questions will be as indicated in the table below:

Chapters

Hours

Marks distribution*

1

5

6

2

4

10

3

6

10

4

6

10

5

6

12

6

4

10

7

6

10

8

8

12

Total

45

80


*Note: There may be minor deviation in marks distribution

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